Coasting

[B0000M]

how do you get it in neutral ?

If you are moving along quickly (100k plus) and you are clutching and changing down and down looking for neutral, you will be overspeeding the gearbox quite dramatically, particularly if you actually get it in first gear.

DB

tadaa!! another road biker sounding like an ass

[Crisis management]

how do you get it in neutral ?

If you are moving along quickly (100k plus) and you are clutching and changing down and down looking for neutral, you will be overspeeding the gearbox quite dramatically, particularly if you actually get it in first gear.

DB

I think you will find motorcycle gearboxes are constant mesh boxes so the only thing you can overspeed is the engine if you let the clutch out......

[CookMySock]

I think you will find motorcycle gearboxes are constant mesh boxes so the only thing you can overspeed is the engine if you let the clutch out......

so you agree that for a constant road speed, the clutch housing spins faster the lower the gear you are in ?

If for example, the top gear ratio is 1:1 and first gear is 6:1 wouldn't the clutch housing be travelling at the same speed ish ? So if the chain drive sprocket rotated at 2,000 rpm, then in top gear the clutch housing would be similar rpm ish. What would the clutch housing rpm be if the chain drive sprocket rotated at 2,000 rpm and you selected first gear ? (hint 6:1 ratio)

Will the clutch unit survive this rpm ?

DB

[takitimu]

Will the clutch unit survive this rpm ?

DB

You were talking about gearbox stress before, now it's clutch stress, keep this up & you might even get to talking about dirt bikes.

[Crisis management]

selected first gear ? (hint 6:1 ratio)

Will the clutch unit survive this rpm ?

DB

Dunno??? (technical term in case you don't recognise it) but the Hyobag sounds like an ideal candidate for a test.

Let me know how you get on.


To attempt a serious answer...what is there in a clutch basket and plates that is likely to be so affected by the centrifugal force of high revs? The plates aren't likely to go anywhere and the basket is a light alloy casting not having a lot of mass.

Thats all I've got to say about it, this is essentially a thread about engine off racing downhill, why are we worried about the clutch?

[scumdog]

how do you get it in neutral ?

If you are moving along quickly (100k plus) and you are clutching and changing down and down looking for neutral, you will be overspeeding the gearbox quite dramatically, particularly if you actually get it in first gear.

DB

Just pull the clutch in, click-click-click down the gears until the nuetral light comes on, let out the clutch and your away...

EDIT: Is it REALLY that hard to figure out???

[DrewBroadley]

Just pull the clutch in, click-click-click down the gears until the nuetral light comes on, let out the clutch and your away...

EDIT: Is it REALLY that hard to figure out???

Yes, if you don't have a neutral light

[scumdog]

Yes, if you don't have a neutral light

Still managed to do it on my old 4-speed H-D that had no neutral light (or rev-counter, indicators etc etc), just had to be more carefull.

[vr4king]

Care Factor = 0

I was told once coasting on dirt bike(motocrosser) should never happen "if your not breaking you should be accelerating and vise versa"

[merv]

Care Factor = 0

I was told once coasting on dirt bike(motocrosser) should never happen "if your not breaking you should be accelerating and vise versa"

Hey we're not talking about GSXR frames here lol

This thread started because marks was talking about coasting for the fun of coasting, which I call going downhill in Maori, and he was concerned about the effects on the bike. I've answered all that for him.

Otherwise sure, your comment about braking (breaking frames haha) or accelerating applies if you are trying to win a race with your engine going normally, but there is also fun to be had doing other silly things in your life.

[Danger]

Care Factor = 0

I was told once coasting on dirt bike(motocrosser) should never happen "if your not breaking you should be accelerating and vise versa"

He says in his first post that he does not have his engine running. Only moving part other than wheels and chain is his sprocket spindle and attached gear. Plenty of lube in the bottom of the gear box and no load means no problems in my opinion. Maybe we should send this one to Myth Busters. I'm sure they could blow his bike up somehow.

[B0000M]

put it this way, ive never heard of anyone ever damaging anything on a dirt bike from doing this